Operation Of Control Parts - Citizen CLP-621 Technical Manual

2-2. Operation of Control Parts

2-2. Operation of Control Parts
2-2-1. Configuration of Printer
The following shows major configuration blocks.
Operation Panel
[Ope-pane PCB]
Thermal Print Head
(Head Temp. Sensor)
Head Up Sensor
Transparent Sensor
Reflective Sensor
Tension Sensor F/R
PF Motor
Ribbon Motor F/R
[Ribbon Main PCB]
AC Inlet &
Power Switch
Major functions of individual components are described below:
(1) Filter & power supply section
Consists of a fuse, a filter circuit to eliminate external electric noise, and a switching type
regulator to transform an AC input to +5V DC and +24V DC outputs required to drive the
printer.
(2) Main PCB
Controls the entire operations of the printer. It consists of CPU, ROM, RAM, Custom IC, driver
circuits, etc.
(3) Operation panel
A panel used to indicate the operating status of the printer and to set specifications. It consists
of 4 keys and 4 LEDs.
CLP-621 & CLP-631
[Main PCB]
Serial I/F
(RS-232C)
Serial I/F
(USB)
Parallel I/F
(IEEE1284)
+5V, +24V
Filter & Power Supply
[Power Supply PCB]
2-16
Parallel I/F
[Centro PCB]
(Option)
Ethernet I/F PCB
Wireless LAN I/F PCB
(Option)
Cutter
Peeler
Host
(PC)